Impossible Mission 3 From Icon64 Coming Soon!https://www.lemon64.com/forum/viewtopic.php?t=79440&start=30
2. REU version requires a Ram Expansion Unit (REU) size 128k+, this version runs at full arcade speed.
Both versions are work in progress, the REU version is only a proof of concept to test out the fast scrolling using REU DMA.